US Bridges

T-499; Lock Willow over I-81; SR 0081

Fair

Dauphin County, Pennsylvania · 1.5 Mi. S.W. Linglestown · Structure no. 000000000014235

Built
1969
56 years old, rebuilt 2007
Condition
Fair
inspected October 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
260 ft
4 main spans
Daily traffic
6,476
2024 count
Owner
State
State Highway Agency

About this bridge

T-499; Lock Willow over I-81; SR 0081 is a prestressed concrete box beam or girders - multiple carrying T-499; Lock Willow over I-81; SR 0081 in Dauphin County, Pennsylvania. It was built in 1969 and reconstructed in 2007, so it is 56 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,476 vehicles a day, roughly 1% of them trucks, projected to reach 7,254 by 2032. The structure is 260 ft (79.2 m) long and 41 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesT-499; Lock Willow
CrossesI-81; SR 0081
Location1.5 Mi. S.W. Linglestown
RouteState Highway 0
CountyDauphin County
StatePennsylvania
Coordinates40.32491, -76.79775
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating47 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span71 ft (21.6 m)
Deck width41 ft (12.6 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,476 (2024)
Projected traffic7,254 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$959,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was T-499; Lock Willow over I-81; SR 0081 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2007.

What condition is T-499; Lock Willow over I-81; SR 0081 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2022.

How much traffic does T-499; Lock Willow over I-81; SR 0081 carry?

About 6,476 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is T-499; Lock Willow over I-81; SR 0081?

The structure is 260 ft (79.2 m) long with a longest span of 71 ft (21.6 m) and a deck 41 ft wide.

Who owns T-499; Lock Willow over I-81; SR 0081?

It is owned by the State Highway Agency.